![]() The virus dioagnoses has an differentiated importance during certification process due to the high amount of screening viral agents, the application of diverse diagnosis tools and/or kits, the long duration of diagnosis process, the usage of different diagnosis tools and protocols in each laboratory, the deviation of sampling time according to the viruses and the necessity of application of more than one method for the diagnosis. ![]() Stock plants present in each genetic source plots are analyzed against to 17 viruses, 9 fungi, 3 bacteria, 2 phytoplasmas, 8 nematodes, 3 insects and mite in the laboratory each year. Certified grapevine production in our country is performed through the controlled prebasic (no 1), basic (no 2) and certified (no 3) genetic sources plots.
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